Harrow-tooth and fastener.



C. C. BOYD.

HARROW TOOTH AND FASTENER.

APPLICATION men JULY 26.1916.

1,205,321 Patented Nov. 21, 1916.

Witnesses CALVIN C. BOYI), F PULA-SKI, PENNSYLVANIA.

HABBOVJ-TOQTI-I AND FASTENER.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Original application filed March 27, 1916, Serial No. 87,040. Dividedand this application filed July 26,

' 1916. Serial No. 111,459.

" tooth can be securely attached to a harrow beam, said fastening meansoperating both to hold th tooth to the beam and to prevent the toothfrom swinging laterally out of proper position.

A further object is to provide a tooth which is so constructed as to beheld against falling out of engagement with its fastening means shouldsaid fastening means work loose.

With the foregoing and other objects in View which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafter de-\l scribed and claimed, it being understood tion.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :-Figure 1 is an enlarged section through the structureconstituting the present invention. Fig. 2 is a rear elevation of theparts shown in Fig. 1. Fig. 3 is a perspective view of a backing plateto be used in connection with a harrow tooth.

Referring to the figures by characters of reference 1 1 designates a barforming a part of a harrow. The tooth used in connection with the bar isformed of a trans versely bowed strip 16 the lower end of which isflared and curved forwardly to a point as at 17, while the upper end ofthe tooth is flared outwardly as at 18. Arranged back of the tooth is aplate 19 having flanges 20 at the top and bottom thereof for engagingthe corresponding faces of the bar 14. Ears 21 extend laterally from thebacking plate 19 and segmental ears 22 extend forwardly from the endportions of the backing plate and are adapted to fit snugly against theconcave face of the tooth. A U-bolt 23 straddles the tooth and extendsthrough the bar 14: and also through a double washer 25 such as shown inFig. 2, which washer engages the back face of the bar 14. Obviously bytightening the U-bolt 23 the tooth 16 will be clamped tightly againstthe backing plate 19 and the segmental ears 22. The arms of the U-boltare extended through the cars 21 so that said bolt is thus preventedfrom spreading. I

Should the bolt become loosened accidentally, the tooth 16 could notdrop out of position for the reason that the flared tion 18 would comeagainst the bolt 23 and hold the tooth attached to the bar 1 1. Thusloss of the tooth is prevented.

In order that the bar 14 may be protected from wear and also provide anefficient backing for the tooth engaging means, the said bar ispreferably provided with a wear strip 4A which can be of angle ironsecured along the lower front edge of the bar.

What is claimed is 2- 1. The combination with a bar, of a backing plateupon the front face of the bar, said plate having rearwardly extendingflanges for engaging the upper and lower faces of the bar, atransversely curved harrow tooth engaging the backing plate, said toothhaving a flared upper end. and a bolt straddling the tooth and extendingthrough the bar for binding the tooth against the plate, said flared endof the tooth constituting means for holding the tooth against downwarddisplacement relative to the bolt. J

2. In a harrow the combination with a bar, of a. backing plate upon thefront face thereof, forwardly extending segmental ears thereon, atransversely bowed tooth fitting snugly against the ears and back plateand 1 having a forwardly flared upper end, a U- bolt straddling thetooth and extending through the back plate and bar and constitutingmeans for binding the tooth against the back plate and ears, the flaredupper end of the tooth constituting means for holding the tooth againstdownward detachment relative to the bolt.

3. The combination with a bar and a backing plate engaging one face ofthe bar, said porplate having forwardly extending ears, of a Intestimony that claim the foregoing harrow tooth straddling the ears andengagas my own, I have hereto affixed my signamg the plate, a fasteningbolt straddling ture in the presence of tWO Witnesses.

th tooth and extending through the plate CALVIN G. BOYD. 5 and bar, saidtooth having a flared upper Witnesses:

end for preventing downward Withdrawal R. McK. WHITE,

of the tooth from the bolt. MONT L. AILEY.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissionef of Patents, Washington, D. C.

